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在总结30号沥青及沥青混合料性能的基础上,在福建省靖海高速公路上设计并成功铺筑了46km、5.5cm厚的30号AC-20C沥青混合料面层。由于30号沥青的黏度大,路面厚度比常用的低标号沥青基层或下面层薄,混合料的施工性能决定了路面质量。文中探讨了30号沥青混合料的不同碾压工艺、碾压遍数对现场空隙率的影响;施工过程中采用PQI测定混合料的压实度与温度变化关系;检测了渗水系数、压实度和厚度等关键指标。对比SBS改性沥青混合料试验段,试验段数据表明:30号沥青混合料路面现场检测结果完全达到甚至超过了SBS改性沥青的现场检测结果,5.5cm厚的30号沥青AC-20混合料面层施工质量能够达到设计或规范对中面层的技术要求。
On the basis of summing up the performance of Asphalt and Asphalt Mixture No.30, 46km and 5.5cm thick AC-20C asphalt pavement was designed and constructed on Jinghai Expressway in Fujian Province. Due to the high viscosity of No. 30 asphalt, the thickness of the pavement is thinner than the commonly used low-grade asphalt base or the lower layer. The construction performance of the mixture determines the pavement quality. In this paper, the effect of different rolling technology and rolling times on the porosity of the ground is discussed. The relationship between compaction degree and temperature of the mixture is determined by PQI during the process of construction. The seepage coefficient, compaction degree And thickness and other key indicators. Compared with the experimental section of SBS modified asphalt mixture, the experimental data show that the on-site testing results of No 30 asphalt mixture completely met or exceeded the on-site test results of SBS modified asphalt, and the thickness of 5.5cm thick asphalt mixture 30 Surface construction quality to meet the design or specification of the surface layer of the technical requirements.